Scattered, severe thunderstorms affected parts of south-central and southeast Wisconsin with large hail on the order of 3/4 to 1-inch diameter hail, powerful downburst winds, and locally heavy rains.  In addition, a weak tornado was observed northwest of Pipe over Lake Winnebago in Fond du Lac County.  Hail caused one thousand dollars in damage to a vehicle in the central part of Dodge County, and fell long enough to cover the ground white at a location 1 mile northeast of Watertown in Dodge county.  The storms also produced locally heavy rains as they moved southeast.  Urban flooding was reported in Waunakee (Dane Co.) at 549 PM CDT due to heavy rainfall rates of 1 to 2 inches per hour resulting in "water over the curb."   High pressure in the Ohio Valley helped to push maximum temperatures into the lower 70s and dew points into the lower 50s on southwesterly winds on May 6.  A cold front approaching south-central and southeast Wisconsin from the north-northwest interacted with the marginally warm and humid airmass to produce the thunderstorms.

Hail in WAUKESHA, WISCONSIN
From 06-MAY-05 18:20:00 to 06-MAY-05 18:20:00 (CST)
Location: MUKWONAGO
Magnitude: 0.88 
Reported by: GENERAL PUBLIC

Hail in DANE, WISCONSIN
From 06-MAY-05 16:30:00 to 06-MAY-05 16:30:00 (CST)
Location: MC FARLAND
Magnitude: 0.75 
Reported by: LAW ENFORCEMENT

Hail in DANE, WISCONSIN
From 06-MAY-05 16:48:00 to 06-MAY-05 16:48:00 (CST)
Location: WAUNAKEE
Magnitude: 0.75 
Reported by: TRAINED SPOTTER

Hail in FOND DU LAC, WISCONSIN
From 06-MAY-05 16:30:00 to 06-MAY-05 16:30:00 (CST)
Location: FOND DU LAC
Magnitude: 0.75 
Reported by: GENERAL PUBLIC

Hail in DANE, WISCONSIN
From 06-MAY-05 17:02:00 to 06-MAY-05 17:10:00 (CST)
Location: MADISON
Magnitude: 0.75 
Reported by: LAW ENFORCEMENT

Hail in WAUKESHA, WISCONSIN
From 06-MAY-05 18:15:00 to 06-MAY-05 18:15:00 (CST)
Location: NORTH PRAIRIE
Magnitude: 1.00 
Reported by: TRAINED SPOTTER

Heavy Rain in DANE, WISCONSIN
From 06-MAY-05 16:49:00 to 06-MAY-05 16:49:00 (CST)
Location: WAUNAKEE
Reported by: LAW ENFORCEMENT

Hail in WAUKESHA, WISCONSIN
From 06-MAY-05 18:00:00 to 06-MAY-05 18:00:00 (CST)
Location: DOUSMAN
Magnitude: 0.88 
Reported by: NWS EMPLOYEE(OFF DUTY)

Hail in JEFFERSON, WISCONSIN
From 06-MAY-05 19:10:00 to 06-MAY-05 19:10:00 (CST)
Location: WATERLOO
Magnitude: 0.88 
Reported by: LAW ENFORCEMENT

Hail in JEFFERSON, WISCONSIN
From 06-MAY-05 19:42:00 to 06-MAY-05 19:42:00 (CST)
Location: LAKE MILLS
Magnitude: 1.00 
Reported by: NWS EMPLOYEE(OFF DUTY)

Hail in FOND DU LAC, WISCONSIN
From 06-MAY-05 15:52:00 to 06-MAY-05 15:52:00 (CST)
Location: WAUCOUSTA
Magnitude: 0.75 
Reported by: LAW ENFORCEMENT

Tornado in FOND DU LAC, WISCONSIN
From 06-MAY-05 15:29:00 to 06-MAY-05 15:31:00 (CST)
Location: PIPE
Tornado F-scale: F0
Reported by: TRAINED SPOTTER

A brief, weak tornado was spotted about 3.2 to 3.0 miles northwest of Pipe (Fond du Lac Co.) just inside the county line over Lake Winnebago.  There were no reports of damage.  This tornado was a continuation of a tornado that spun up over Lake Winnebago about 7.8 miles east-southeast of Oshkosh in Winnebago County at 1324CST and moved to a point 3.7 miles southwest of Brothertown at 1329CST in extreme southwest Calumet County. This tornado was seen by a severe weather spotter from Calumet County.  The surface position is and F-scale rating are estimated and based on the spotter's report.

Hail in DODGE, WISCONSIN
From 06-MAY-05 16:12:00 to 06-MAY-05 16:12:00 (CST)
Location: BEAVER DAM
Magnitude: 0.75 
Reported by: LAW ENFORCEMENT

Hail in DODGE, WISCONSIN
From 06-MAY-05 16:25:00 to 06-MAY-05 16:28:00 (CST)
Location: LOWELL
Magnitude: 0.75 
Property damage: 1K
Reported by: LAW ENFORCEMENT

Minor damage to a vehicle.

Hail in FOND DU LAC, WISCONSIN
From 06-MAY-05 16:27:00 to 06-MAY-05 16:30:00 (CST)
Location: FOND DU LAC
Magnitude: 0.75 
Reported by: LAW ENFORCEMENT

Hail in DANE, WISCONSIN
From 06-MAY-05 17:30:00 to 06-MAY-05 17:30:00 (CST)
Location: MC FARLAND
Magnitude: 0.75 
Reported by: LAW ENFORCEMENT

Hail in DANE, WISCONSIN
From 06-MAY-05 17:40:00 to 06-MAY-05 17:40:00 (CST)
Location: STOUGHTON
Magnitude: 0.88 
Reported by: LAW ENFORCEMENT

Hail in DANE, WISCONSIN
From 06-MAY-05 18:14:00 to 06-MAY-05 18:14:00 (CST)
Location: ALBION
Magnitude: 0.88 
Reported by: TRAINED SPOTTER

Hail in WAUKESHA, WISCONSIN
From 06-MAY-05 17:43:00 to 06-MAY-05 17:43:00 (CST)
Location: OCONOMOWOC
Magnitude: 0.75 
Reported by: NWS EMPLOYEE(OFF DUTY)

Hail in DODGE, WISCONSIN
From 06-MAY-05 17:15:00 to 06-MAY-05 17:15:00 (CST)
Location: WATERTOWN
Magnitude: 0.75 
Property damage: 1K
Reported by: TRAINED SPOTTER

Hail accumulated to cover the ground white.  Minor damage to a vehicle.

Hail in JEFFERSON, WISCONSIN
From 06-MAY-05 18:28:00 to 06-MAY-05 18:28:00 (CST)
Location: BUSSEYVILLE
Magnitude: 0.75 
Reported by: AMATEUR RADIO